CHEMICAL REACTION ENGINEERING QUIZ

The optimum performance for reactors operating in parallel is obtained when the feed stream is distributed in such a way, that the

None of these

Space time for parallel lines is different

Larger reactors have more space time compared to smaller ones

Space time for each parallel line is same

TRUE ANSWER : ?
YOUR ANSWER : ?

A chemical reaction is of zero order, when the reaction rate is (where, CA = concentration of reactant)

None of these

∝ 1/CA

Independent of temperature

∝ CA

TRUE ANSWER : ?
YOUR ANSWER : ?

The half life period of a first order reaction is

Half the specific rate constant

Proportional to the initial concentration of reactants

Dependent on initial concentration of the reactants

Always the same irrespective of the reaction

TRUE ANSWER : ?
YOUR ANSWER : ?

Reaction rate of a first order reaction, which is half completed in 23 minutes will be

0.03 hr⁻¹

0.03 min⁻¹

0.05 min⁻¹

0.03 sec⁻¹

TRUE ANSWER : ?
YOUR ANSWER : ?

A balanced chemical reaction equation conforms to the law of

Gaseous volumes

Conservation of mass

None ofthese

Avagadro's hypothesis

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is used for calcination of limestone and dolomite in industrial practice?

Fluidised bed reactor

None of these

Moving bed reactor

Fixed bed reactor

TRUE ANSWER : ?
YOUR ANSWER : ?

The enzyme which can catalyse the conversion of glucose to ethyl alcohol is

Zymase

Maltase

Invertase

Diastase

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is an independent variable for a batch tank reactor with uniform concentration and temperature?

Diameter of the reactor

Time

Useful volume of the tank

None of these

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For reactions in parallel viz A → P (desired product) and A → Q (unwanted product), if the order of the desired reaction is higher than that of the undesired reaction, a

Single CSTR is the most suitable

Tubular reactor is preferred over a single CSTR for high yield

Both A and B

Batch reactor is preferred over a single CSTR for high yield

TRUE ANSWER : ?
YOUR ANSWER : ?

A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and kg respectively. The effective rate constant (keff) is given by

keff = k + kg

1/keff = 1/k + 1/kg

keff = (kkg)1/2

keff = (k+ kg)/2

TRUE ANSWER : ?
YOUR ANSWER : ?